I have located this soldier, he is named in the SNWM but from what I can see from the photos he is not named on this memorial.

GALLACHER, Bernard Private 976 6th Bn Royal Munster Fusiliers
Born: Kirkintilloch, Dumbartonshire Resided: Kirkintilloch Enlisted: Kirkintilloch.
Date of Death: 13/08/1915 Cause: Died of Wounds.
Special Notes: Private Gallacher is listed in Soldiers Died (Part 72) and the CWGC with his date of death shown as “13/8/15”; the IWM records show his date of death as “03/8/15”.
Grave/Memorial: Panel 185 to 190. Helles Memorial.
Other Memorials: Private Gallacher is named on the Scottish Roll of Honour, Scottish National War Memorial, Edinburgh Castle, Edinburgh.
Irish War Memorial Records Page No: Volume III, Page 241.